Multiple layer packaging films and packages formed thereof
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United States of America Patent
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Mar 20, 1990
Issued Date -
N/A
app pub date -
Oct 11, 1988
filing date -
Nov 29, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention discloses a multiple layer film useful in packaging, and the packages made therefrom. A first layer of the film is a material containing an ester group, a polycarbonate or a polyether block amide copolymer. A second layer of the film is a sealant, preferably polypropylene polymer blended with an elastomeric styrene ethylene butylene styrene copolymer. A third functionally adhesive layer is between the first and second layers. The composition of the third adhesive layer is typically either a polypropylene modified with a carboxy group such as an organic acid or anhydride or a styrene ethylene butylene styrene copolymer.
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